/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package servlets;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.CustomerMgtBackend.db.DB_Access;

/**
 *
 * @author Vodo
 */
@WebServlet(name = "Register", urlPatterns = {"/register"})
public class Register extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    private DB_Access dba;
    
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
           response.sendRedirect("jsp/Register.jsp");
        } finally {            
            out.close();
        }
    }
    
      @Override
    public void init(ServletConfig config) throws ServletException {
        super.init(config); //To change body of generated methods, choose Tools | Templates.
        try {
            dba= DB_Access.getInstance();
        } catch (ClassNotFoundException ex) {
            Logger.getLogger(Register.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        
            String username = request.getParameter("username");
            String password = request.getParameter("password");
            String password2 = request.getParameter("confirmPassword");
            String errMsg = "";
             HttpSession session = request.getSession();
             try {
               
            if(username == null || password == null || password2 == null)
            {
             
                errMsg = "This error should never occur"; 
                session.setAttribute("error", errMsg);
                processRequest(request, response);
                return;
            }
            
            username = username.trim();
            password = password.trim();
            password2 = password.trim();
            if(username.isEmpty())
            {
                 errMsg = "Please enter username!"; 
            }
             else if(password.isEmpty()||password2.isEmpty())
            {
                 errMsg += "</br>Please enter both passwords!"; 
            }
       
             else if(!password.equals(password2))
            {
                 errMsg = "Please enter two identical passwords!"; 
            }
            else if(password.length()<8)
            {
                  errMsg = "Minimum password length is eight"; 
            }
            else if(!password.matches(".*[0-9].*"))
            {
                errMsg="Use at least one digit for password";
            }
            else if(!password.matches(".*[A-Z].*"))
            {
                errMsg="Use at least one capital letter for password";
            }
            else if(!password.matches(".*[a-z].*"))
            {
                errMsg="Use at least one lowercase letter for password";
            }
            else if(dba.checkUser(username))
            {
                errMsg="Username already exists";
            }
            else if(!dba.register(username, password))
            {
                errMsg="Register not possible";
            }
             }
            catch (Exception ex) {
            Logger.getLogger(Register.class.getName()).log(Level.SEVERE, null, ex);
            }
            
            if(!errMsg.isEmpty())
            {
               session.setAttribute("error", errMsg);
                response.sendRedirect("jsp/Register.jsp");
            }
            else
            {
                session.removeAttribute("error");
                response.sendRedirect("jsp/Login.jsp");
            }
        
       
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
    
  
   
    
    
    
}
